There is only one place in the world where the corners of four nations come together.

One man's ambition created this psychedelic log home.

The only building in the western U.S. designed by the Finnish architect Alvar Aalto.

Despite his legacy of work in Spain, Cuba, and Florida, the larger-than-life writer's grave is a simple affair tucked in an Idaho cemetery.

Tucked away on a scenic trail, a modest memorial honors one of the greatest writers of our time.

The first declared National Monument in the United States.

A memorial to the most decisive Native American victory of the Plains Indian War.

The source of America's longest river is also a historical landmark and the start of a famous nude run.

Between Missoula and Spokane, a family-owned travel center has an unusual museum in the back.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

The final resting place of the Hunkpapa Lakota leader Tatanka Iyotaka, commonly known by the English translation Sitting Bull.

The world's largest Holstein cow.

One man's quest to save his town with a trail of record-breaking sculptures.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

Palace where the nearly un-killable Rasputin was murdered.

This independent library is rooted in community service and lifelong learning.

Oregon's only closed-basin hypersaline lake, an important stopover for migrating waterfowl, is in danger of drying up completely.

Multiple waterfalls and several historic CCC buildings anchor this state park in Oregon's Willamette Valley.

A haven for wildlife amid the farmlands and development of the Willamette River Valley.

Ride a gondola up to this historic mountainside eatery.

A unique structure located on the grounds of one of five grand palaces that were built by the Joseon dynasty.

World's largest porcine hairball sits in a collection maintained by Benedictine monks.